Highest reported national prevalence of ulcerative colitis (Norway)

505 per 100 000

per 10,000 people, Norway (highest reported value in the review; no worldwide figure)

“The highest reported prevalence values were in Europe (ulcerative colitis 505 per 100 000 in Norway; Crohn's disease 322 per 100 000 in Germany) and North America (ulcerative colitis 286 per 100 000 in the USA; Crohn's disease 319 per 100 000 in Canada).”

Ng et al., Worldwide incidence and prevalence of inflammatory bowel disease in the 21st century, Lancet 2017, 2017

Kind of source

Peer-reviewed study

Read on

2026-11-06

Daily check

Quote found at the source on 2026-11-06

What to know

A top-of-range national value, not a global average. USA 286 per 100 000.

About

Ulcerative colitis